Manufacturing method of cyclohexylamine
Cyclohexylamine is an important organic chemical raw material, which is widely used in pesticides, pharmaceuticals, dyestuffs, rubber auxiliaries and other fields. The manufacturing method of cyclohexylamine will be introduced below.
I. Preparation principle
The preparation of cyclohexylamine is mainly through the dehydration reaction between cyclohexanol and ammonia under the action of catalyst to produce cyclohexylamine and water. The reaction equation is as follows:
Cyclohexanol + Ammonia → Cyclohexylamine + Water
II. Process Flow
1. Dosing
Quantitative cyclohexanol and liquid ammonia are added into the dosing kettle respectively, and stirred well. The proportion of dosing is adjusted according to the product demand. Reaction
Pump the material in the dosing kettle into the reaction kettle, heat it up to a certain temperature, add catalyst and carry out dehydration reaction. Temperature and pressure should be controlled during the reaction to maintain a stable reaction environment.
3. Separation
After the reaction is finished, cool the reaction liquid to a certain temperature and precipitate the cyclohexylamine crystals. The crystals are separated from the mother liquor by centrifuge or filtration equipment.
4. Washing
The crystals are washed with a certain amount of water to remove impurities. The washing liquid can be recycled.
5. Drying
The washed crystals are fed into the drying equipment for drying process to get the dried cyclohexylamine product.
6. Packing
Pack the product according to specifications and put it into storage for sale.
3. Precautions
1. The selection of catalyst has an important influence on the reaction speed and product selectivity, so it is necessary to screen the catalyst according to the actual situation.
2. During the reaction process, the temperature and pressure need to be strictly controlled to ensure the stability of the reaction environment and improve the product quality.
3. During centrifugal separation and washing, the equipment should be kept clean to prevent the product from being contaminated.
4. During the drying process, the drying temperature and time should be controlled to avoid overheating or over-drying of the product.
4. Environmental protection and safety
1. Waste water, waste gas and other pollutants generated in the production process need to be treated and discharged after meeting the environmental standards.
2. The operators need to be professionally trained and comply with the safety operation regulations to ensure the safety of the production process.
3. The production site needs to be equipped with corresponding fire-fighting equipment and first-aid medicines to cope with emergencies.
V. Optimization and improvement
In order to improve the production efficiency and quality of cyclohexylamine, the process can be optimized and improved as follows:
1. Adopt new type of catalyst to improve the reaction speed and product selectivity.
2. Introduce automatic control system to optimize the control of temperature, pressure and other parameters in the production process to improve the production stability.
3. Strengthen equipment maintenance and repair, reduce equipment failure and improve equipment operation efficiency.
4. Optimize the energy of the production process, reduce energy consumption, and improve the economic efficiency of the enterprise.
In short, the manufacturing method of cyclohexylamine needs to be adjusted and optimized according to the actual situation, in order to improve the production efficiency, reduce energy consumption, reduce pollution and improve product quality. At the same time, the safety management and environmental protection in the production process are strengthened to ensure the smooth progress of the production process.
